Coefficient inequalities for analytic functions associated with cardioid domains

被引:13
作者
Raza, Mohsan [1 ]
Mushtaq, Saima [1 ]
Malik, Sarfraz Nawaz [2 ]
Sokol, Janusz [3 ]
机构
[1] Govt Coll Univ Faisalabad, Dept Math, Faisalabad, Pakistan
[2] COMSATS Univ Islamabad, Dept Math, Wah Cantt Campus, Islamabad, Pakistan
[3] Univ Rzeszow, Coll Math & Nat Sci, Ul Prof Pigonia 1, PL-35310 Rzeszow, Poland
来源
HACETTEPE JOURNAL OF MATHEMATICS AND STATISTICS | 2020年 / 49卷 / 06期
关键词
analytic functions; shell-like curve; Fibonacci numbers; cardioid domain; starlike functions;
D O I
10.15672/hujms.595068
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
The geometry of image domain of analytic functions is of substantial importance to have a comprehensive study of analytic functions. Malik et al. [Analytic functions associated with cardioid domain, submitted] introduced a new class of functions connected with cardioid domain and established coefficient bounds for functions in this class. Also the bounds for the coefficients of Taylor series and their related functional inequalities are of major interest. In this article, we aim to find the sharp bounds for the coefficients and to estimate the Fekete-Szego functional for certain analytic functions associated with cardioid domain. The same type results are obtained for inverse functions and for log(f(z)/z).
引用
收藏
页码:2017 / 2027
页数:11
相关论文
共 15 条
[1]   On a class of starlike functions related to a shell-like curve connected with Fibonacci numbers [J].
Dziok, Jacek ;
Raina, Ravinder Krishna ;
Sokol, Janusz .
MATHEMATICAL AND COMPUTER MODELLING, 2013, 57 (5-6) :1203-1211
[2]   Certain results for a class of convex functions related to a shell-like curve connected with Fibonacci numbers [J].
Dziok, Jacek ;
Raina, Ravinder Krishna ;
Sokol, Janusz .
COMPUTERS & MATHEMATICS WITH APPLICATIONS, 2011, 61 (09) :2605-2613
[3]   On α-convex functions related to shell-like functions connected with Fibonacci numbers [J].
Dziok, Jacek ;
Raina, Ravinder Krishna ;
Sokol, Janusz .
APPLIED MATHEMATICS AND COMPUTATION, 2011, 218 (03) :996-1002
[4]  
Fekete M., 1933, J. Lond. Math. Soc, V8, P85, DOI [10.1112/jlms/s1-8.2.85, DOI 10.1112/JLMS/S1-8.2.85]
[5]  
Goodman AW., 1983, Univalent Functions, VI
[6]  
Janowski W., 1973, Ann Polon Math, V28, P297
[7]   Conic regions and k-uniform convexity [J].
Kanas, S ;
Wisniowska, A .
JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS, 1999, 105 (1-2) :327-336
[8]  
Malik S.N., ANAL FUNCTIONS ASS C
[9]  
Malik S.N., STARLIKE FUNCTIONS A
[10]   On coefficient inequalities of functions associated with conic domains [J].
Noor, Khalida Inayat ;
Malik, Sarfraz Nawaz .
COMPUTERS & MATHEMATICS WITH APPLICATIONS, 2011, 62 (05) :2209-2217